 /*
 * libmad - MPEG audio decoder library
 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; #if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * #if you would like to negotiate alternate licensing terms, you may do
 * so by contacting: Underbit Technologies, Inc. <info@underbit.com>
 */

#ifdef __cplusplus
 extern "C" {
#endif

#define FPM_INTEL



#define SIZEOF_INT 4
#define SIZEOF_LONG 4
#define SIZEOF_LONG_LONG 8


/* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */

#ifndef LIBMAD_VERSION_H
#define LIBMAD_VERSION_H
#define MAD_VERSION_MAJOR 0
#define MAD_VERSION_MINOR 15
#define MAD_VERSION_PATCH 1
#define MAD_VERSION_EXTRA " (beta)"

#define MAD_VERSION_STRINGIZE(str) str
#define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num)

#define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \
MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \
MAD_VERSION_STRING(MAD_VERSION_PATCH) \
MAD_VERSION_EXTRA

#define MAD_PUBLISHYEAR "2000-2004"
#define MAD_AUTHOR "Underbit Technologies, Inc."
#define MAD_EMAIL "info@underbit.com"

 extern char const mad_version[];
 extern char const mad_copyright[];
 extern char const mad_author[];
 extern char const mad_build[];

  #endif

 /* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */

  #ifndef LIBMAD_FIXED_H
  #define LIBMAD_FIXED_H

  #if SIZEOF_INT >= 4
 typedef signed int mad_fixed_t;

 typedef signed int mad_fixed64hi_t;
 typedef unsigned int mad_fixed64lo_t;
#else
 typedef signed long mad_fixed_t;

 typedef signed long mad_fixed64hi_t;
 typedef unsigned long mad_fixed64lo_t;
  #endif

#if defined(_MSC_VER)
  #define mad_fixed64_t signed __int64
#elif 1 || defined(__GNUC__)
  #define mad_fixed64_t signed long long
  #endif

#if defined(FPM_FLOAT)
 typedef double mad_sample_t;
#else
 typedef mad_fixed_t mad_sample_t;
  #endif

 /*
 * Fixed-point format: 0xABBBBBBB
 * A == whole part (sign + 3 bits)
 * B == fractional part (28 bits)
 *
 * Values are signed two's complement, so the effective range is:
 * 0x80000000 to 0x7fffffff
 * -8.0 to +7.9999999962747097015380859375
 *
 * The smallest representable value is:
 * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
 *
 * 28 bits of fractional accuracy represent about
 * 8.6 digits of decimal accuracy.
 *
 * Fixed-point numbers can be added or subtracted as normal
 * integers, but multiplication requires shifting the 64-bit result
 * from 56 fractional bits back to 28 (and rounding.)
 *
 * Changing the definition of MAD_F_FRACBITS is only partially
 * supported, and must be done with care.
 */

  #define MAD_F_FRACBITS 28

#if MAD_F_FRACBITS == 28
  #define MAD_F(x) ((mad_fixed_t) (x))
#else
#if MAD_F_FRACBITS < 28
  warning "MAD_F_FRACBITS < 28"
  #define MAD_F(x) ((mad_fixed_t) \
 (((xL) + \
 (1L << (28 - MAD_F_FRACBITS - 1))) >> \
 (28 - MAD_F_FRACBITS)))
  elif MAD_F_FRACBITS > 28
  error "MAD_F_FRACBITS > 28 not currently supported"
  #define MAD_F(x) ((mad_fixed_t) \
 ((xL) << (MAD_F_FRACBITS - 28)))
  #endif
  #endif

  #define MAD_F_MIN ((mad_fixed_t) -0x80000000L)
  #define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL)

  #define MAD_F_ONE MAD_F(0x10000000)

  #define mad_f_tofixed(x) ((mad_fixed_t) \
 ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5))
  #define mad_f_todouble(x) ((double) \
 ((x) / (double) (1L << MAD_F_FRACBITS)))

  #define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS)
  #define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1))
 /* (x should be positive) */

  #define mad_f_fromint(x) ((x) << MAD_F_FRACBITS)

  #define mad_f_add(x, y) ((x) + (y))
  #define mad_f_sub(x, y) ((x) - (y))

#if defined(FPM_FLOAT)
  error "FPM_FLOAT not yet supported"

  undef MAD_F
  #define MAD_F(x) mad_f_todouble(x)

  #define mad_f_mul(x, y) ((x) * (y))
  #define mad_f_scale64

  undef ASO_ZEROCHECK

  elif defined(FPM_64BIT)

 /*
 * This version should be the most accurate #if 64-bit types are supported by
 * the compiler, although it may not be the most efficient.
 */
#if defined(OPT_ACCURACY)
  #define mad_f_mul(x, y) \
 ((mad_fixed_t) \
 ((((mad_fixed64_t) (x) * (y)) + \
 (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS))
  #else
  #define mad_f_mul(x, y) \
 ((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS))
  #endif

  #define MAD_F_SCALEBITS MAD_F_FRACBITS

 /* --- Intel --------------------------------------------------------------- */

#elif defined(FPM_INTEL)

#if defined(_MSC_VER)
  #pragma warning(push)
  #pragma warning(disable: 4035) /* no return value */
 static __forceinline

 mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
 {
 enum {
 fracbits = MAD_F_FRACBITS
 };


 __asm {
 mov eax, x
 imul y
 shrd eax, edx, fracbits
 }

 // implicit return of eax //
 }
  #pragma warning(pop)

  #define mad_f_mul mad_f_mul_inline
  #define mad_f_scale64
  #else
 /*
 * This Intel version is fast and accurate; the disposition of the least
 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
 */
  #define MAD_F_MLX(hi, lo, x, y) \
 asm ("imull %3" \
 : "=a" (lo), "=d" (hi) \
 : "%a" (x), "rm" (y) \
 : "cc")

#if defined(OPT_ACCURACY)
 /*
 * This gives best accuracy but is not very fast.
 */
  #define MAD_F_MLA(hi, lo, x, y) \
 ({ mad_fixed64hi_t __hi; \
 mad_fixed64lo_t __lo; \
 MAD_F_MLX(__hi, __lo, (x), (y)); \
 asm ("addl %2,%0\n\t" \
 "adcl %3,%1" \
 : "=rm" (lo), "=rm" (hi) \
 : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \
 : "cc"); \
 })
  #endif /* OPT_ACCURACY */

#if defined(OPT_ACCURACY)
 /*
 * Surprisingly, this is faster than SHRD followed by ADC.
 */
  #define mad_f_scale64(hi, lo) \
 ({ mad_fixed64hi_t __hi_; \
 mad_fixed64lo_t __lo_; \
 mad_fixed_t __result; \
 asm ("addl %4,%2\n\t" \
 "adcl %5,%3" \
 : "=rm" (__lo_), "=rm" (__hi_) \
 : "0" (lo), "1" (hi), \
 "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \
 : "cc"); \
 asm ("shrdl %3,%2,%1" \
 : "=rm" (__result) \
 : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \
 : "cc"); \
 __result; \
 })
#elif defined(OPT_INTEL)
 /*
 * Alternate Intel scaling that may or may not perform better.
 */
  #define mad_f_scale64(hi, lo) \
 ({ mad_fixed_t __result; \
 asm ("shrl %3,%1\n\t" \
 "shll %4,%2\n\t" \
 "orl %2,%1" \
 : "=rm" (__result) \
 : "0" (lo), "r" (hi), \
 "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \
 : "cc"); \
 __result; \
 })
#else
  #define mad_f_scale64(hi, lo) \
 ({ mad_fixed_t __result; \
 asm ("shrdl %3,%2,%1" \
 : "=rm" (__result) \
 : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \
 : "cc"); \
 __result; \
 })
  #endif /* OPT_ACCURACY */

  #define MAD_F_SCALEBITS MAD_F_FRACBITS
  #endif

 /* --- ARM ----------------------------------------------------------------- */

#elif defined(FPM_ARM)

 /*
 * This ARM V4 version is as accurate as FPM_64BIT but much faster. The
 * least significant bit is properly rounded at no CPU cycle cost!
 */
#if 1
 /*
 * This is faster than the default implementation via MAD_F_MLX() and
 * mad_f_scale64().
 */
  #define mad_f_mul(x, y) \
 ({ mad_fixed64hi_t __hi; \
 mad_fixed64lo_t __lo; \
 mad_fixed_t __result; \
 asm ("smull %0, %1, %3, %4\n\t" \
 "movs %0, %0, lsr %5\n\t" \
 "adc %2, %0, %1, lsl %6" \
 : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
 : "%r" (x), "r" (y), \
 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
 : "cc"); \
 __result; \
 })
  #endif

  #define MAD_F_MLX(hi, lo, x, y) \
 asm ("smull %0, %1, %2, %3" \
 : "=&r" (lo), "=&r" (hi) \
 : "%r" (x), "r" (y))

  #define MAD_F_MLA(hi, lo, x, y) \
 asm ("smlal %0, %1, %2, %3" \
 : "+r" (lo), "+r" (hi) \
 : "%r" (x), "r" (y))

  #define MAD_F_MLN(hi, lo) \
 asm ("rsbs %0, %2, 0\n\t" \
 "rsc %1, %3, 0" \
 : "=r" (lo), "=r" (hi) \
 : "0" (lo), "1" (hi) \
 : "cc")

  #define mad_f_scale64(hi, lo) \
 ({ mad_fixed_t __result; \
 asm ("movs %0, %1, lsr %3\n\t" \
 "adc %0, %0, %2, lsl %4" \
 : "=&r" (__result) \
 : "r" (lo), "r" (hi), \
 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
 : "cc"); \
 __result; \
 })

  #define MAD_F_SCALEBITS MAD_F_FRACBITS

 /* --- MIPS ---------------------------------------------------------------- */

#elif defined(FPM_MIPS)

 /*
 * This MIPS version is fast and accurate; the disposition of the least
 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
 */
  #define MAD_F_MLX(hi, lo, x, y) \
 asm ("mult %2,%3" \
 : "=l" (lo), "=h" (hi) \
 : "%r" (x), "r" (y))

  #if defined(HAVE_MADD_ASM)
  #define MAD_F_MLA(hi, lo, x, y) \
 asm ("madd %2,%3" \
 : "+l" (lo), "+h" (hi) \
 : "%r" (x), "r" (y))
  elif defined(HAVE_MADD16_ASM)
 /*
 * This loses significant accuracy due to the 16-bit integer limit in the
 * multiply/accumulate instruction.
 */
  #define MAD_F_ML0(hi, lo, x, y) \
 asm ("mult %2,%3" \
 : "=l" (lo), "=h" (hi) \
 : "%r" ((x) >> 12), "r" ((y) >> 16))
  #define MAD_F_MLA(hi, lo, x, y) \
 asm ("madd16 %2,%3" \
 : "+l" (lo), "+h" (hi) \
 : "%r" ((x) >> 12), "r" ((y) >> 16))
  #define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo))
  #endif

  #if defined(OPT_SPEED)
  #define mad_f_scale64(hi, lo) \
 ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS)))
  #define MAD_F_SCALEBITS MAD_F_FRACBITS
  #endif

 /* --- SPARC --------------------------------------------------------------- */

  elif defined(FPM_SPARC)

 /*
 * This SPARC V8 version is fast and accurate; the disposition of the least
 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
 */
  #define MAD_F_MLX(hi, lo, x, y) \
 asm ("smul %2, %3, %0\n\t" \
 "rd %%y, %1" \
 : "=r" (lo), "=r" (hi) \
 : "%r" (x), "rI" (y))

 /* --- PowerPC ------------------------------------------------------------- */

  elif defined(FPM_PPC)

 /*
 * This PowerPC version is fast and accurate; the disposition of the least
 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
 */
  #define MAD_F_MLX(hi, lo, x, y) \
 do { \
 asm ("mullw %0,%1,%2" \
 : "=r" (lo) \
 : "%r" (x), "r" (y)); \
 asm ("mulhw %0,%1,%2" \
 : "=r" (hi) \
 : "%r" (x), "r" (y)); \
 } \
 while (0)

  #if defined(OPT_ACCURACY)
 /*
 * This gives best accuracy but is not very fast.
 */
  #define MAD_F_MLA(hi, lo, x, y) \
 ({ mad_fixed64hi_t __hi; \
 mad_fixed64lo_t __lo; \
 MAD_F_MLX(__hi, __lo, (x), (y)); \
 asm ("addc %0,%2,%3\n\t" \
 "adde %1,%4,%5" \
 : "=r" (lo), "=r" (hi) \
 : "%r" (lo), "r" (__lo), \
 "%r" (hi), "r" (__hi) \
 : "xer"); \
 })
  #endif

  #if defined(OPT_ACCURACY)
 /*
 * This is slower than the truncating version below it.
 */
  #define mad_f_scale64(hi, lo) \
 ({ mad_fixed_t __result, __round; \
 asm ("rotrwi %0,%1,%2" \
 : "=r" (__result) \
 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
 asm ("extrwi %0,%1,1,0" \
 : "=r" (__round) \
 : "r" (__result)); \
 asm ("insrwi %0,%1,%2,0" \
 : "+r" (__result) \
 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
 asm ("add %0,%1,%2" \
 : "=r" (__result) \
 : "%r" (__result), "r" (__round)); \
 __result; \
 })
  #else
  #define mad_f_scale64(hi, lo) \
 ({ mad_fixed_t __result; \
 asm ("rotrwi %0,%1,%2" \
 : "=r" (__result) \
 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
 asm ("insrwi %0,%1,%2,0" \
 : "+r" (__result) \
 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
 __result; \
 })
  #endif

  #define MAD_F_SCALEBITS MAD_F_FRACBITS

 /* --- Default ------------------------------------------------------------- */

  elif defined(FPM_DEFAULT)

 /*
 * This version is the most portable but it loses significant accuracy.
 * Furthermore, accuracy is biased against the second argument, so care
 * should be taken when ordering operands.
 *
 * The scale factors are constant as this is not used with SSO.
 *
 * Pre-rounding is required to stay within the limits of compliance.
 */
  #if defined(OPT_SPEED)
  #define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16))
  #else
  #define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \
 (((y) + (1L << 15)) >> 16))
  #endif

 /* ------------------------------------------------------------------------- */

  #else
  error "no FPM selected"
  #endif

 /* default implementations */

  #if !defined(mad_f_mul)
  #define mad_f_mul(x, y) \
 ({ register mad_fixed64hi_t __hi; \
 register mad_fixed64lo_t __lo; \
 MAD_F_MLX(__hi, __lo, (x), (y)); \
 mad_f_scale64(__hi, __lo); \
 })
  #endif

  #if !defined(MAD_F_MLA)
  #define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y)))
  #define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y)))
  #define MAD_F_MLN(hi, lo) ((lo) = -(lo))
  #define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
  #endif

  #if !defined(MAD_F_ML0)
  #define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y))
  #endif

  #if !defined(MAD_F_MLN)
  #define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi))
  #endif

  #if !defined(MAD_F_MLZ)
  #define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo))
  #endif

  #if !defined(mad_f_scale64)
  #if defined(OPT_ACCURACY)
  #define mad_f_scale64(hi, lo) \
 ((((mad_fixed_t) \
 (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \
 ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1)
  #else
  #define mad_f_scale64(hi, lo) \
 ((mad_fixed_t) \
 (((hi) << (32 - MAD_F_SCALEBITS)) | \
 ((lo) >> MAD_F_SCALEBITS)))
  #endif
  #define MAD_F_SCALEBITS MAD_F_FRACBITS
  #endif

 /* C routines */

 mad_fixed_t mad_f_abs(mad_fixed_t);
 mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t);

  #endif

 /* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */

  #ifndef LIBMAD_BIT_H
  #define LIBMAD_BIT_H

 struct mad_bitptr {
 unsigned char const *byte;
 unsigned short cache;
 unsigned short left;
 };

 void mad_bit_init(struct mad_bitptr *, unsigned char const *);

  #define mad_bit_finish(bitptr) /* nothing */

 unsigned int mad_bit_length(struct mad_bitptr const *,
 struct mad_bitptr const *);

  #define mad_bit_bitsleft(bitptr) ((bitptr)->left)
 unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);

 void mad_bit_skip(struct mad_bitptr *, unsigned int);
 unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
 void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);

 unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);

  #endif

 /* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */

  #ifndef LIBMAD_TIMER_H
  #define LIBMAD_TIMER_H

 typedef struct {
 signed long seconds; /* whole seconds */
 unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
 } mad_timer_t;

 extern mad_timer_t const mad_timer_zero;

  #define MAD_TIMER_RESOLUTION 352800000UL

 enum mad_units {
 MAD_UNITS_HOURS = -2,
 MAD_UNITS_MINUTES = -1,
 MAD_UNITS_SECONDS = 0,

 /* metric units */

 MAD_UNITS_DECISECONDS = 10,
 MAD_UNITS_CENTISECONDS = 100,
 MAD_UNITS_MILLISECONDS = 1000,

 /* audio sample units */

 MAD_UNITS_8000_HZ = 8000,
 MAD_UNITS_11025_HZ = 11025,
 MAD_UNITS_12000_HZ = 12000,

 MAD_UNITS_16000_HZ = 16000,
 MAD_UNITS_22050_HZ = 22050,
 MAD_UNITS_24000_HZ = 24000,

 MAD_UNITS_32000_HZ = 32000,
 MAD_UNITS_44100_HZ = 44100,
 MAD_UNITS_48000_HZ = 48000,

 /* video frame/field units */

 MAD_UNITS_24_FPS = 24,
 MAD_UNITS_25_FPS = 25,
 MAD_UNITS_30_FPS = 30,
 MAD_UNITS_48_FPS = 48,
 MAD_UNITS_50_FPS = 50,
 MAD_UNITS_60_FPS = 60,

 /* CD audio frames */

 MAD_UNITS_75_FPS = 75,

 /* video drop-frame units */

 MAD_UNITS_23_976_FPS = -24,
 MAD_UNITS_24_975_FPS = -25,
 MAD_UNITS_29_97_FPS = -30,
 MAD_UNITS_47_952_FPS = -48,
 MAD_UNITS_49_95_FPS = -50,
 MAD_UNITS_59_94_FPS = -60
 };

  #define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))

 int mad_timer_compare(mad_timer_t, mad_timer_t);

  #define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)

 void mad_timer_negate(mad_timer_t *);
 mad_timer_t mad_timer_abs(mad_timer_t);

 void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
 void mad_timer_add(mad_timer_t *, mad_timer_t);
 void mad_timer_multiply(mad_timer_t *, signed long);

 signed long mad_timer_count(mad_timer_t, enum mad_units);
 unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
 void mad_timer_string(mad_timer_t, char *, char const *,
 enum mad_units, enum mad_units, unsigned long);

  #endif

 /* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */

  #ifndef LIBMAD_STREAM_H
  #define LIBMAD_STREAM_H


  #define MAD_BUFFER_GUARD 8
  #define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD)

 enum mad_error {
 MAD_ERROR_NONE = 0x0000, /* no error */

 MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */
 MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */

 MAD_ERROR_NOMEM = 0x0031, /* not enough memory */

 MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */
 MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */
 MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */
 MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */
 MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */

 MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */
 MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */
 MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */
 MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */
 MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */
 MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */
 MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */
 MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */
 MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */
 MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */
 MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */
 MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */
 MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */
 };

  #define MAD_RECOVERABLE(error) ((error) & 0xff00)

 struct mad_stream {
 unsigned char const *buffer; /* input bitstream buffer */
 unsigned char const *bufend; /* end of buffer */
 unsigned long skiplen; /* bytes to skip before next frame */

 int sync; /* stream sync found */
 unsigned long freerate; /* free bitrate (fixed) */

 unsigned char const *this_frame; /* start of current frame */
 unsigned char const *next_frame; /* start of next frame */
 struct mad_bitptr ptr; /* current processing bit pointer */

 struct mad_bitptr anc_ptr; /* ancillary bits pointer */
 unsigned int anc_bitlen; /* number of ancillary bits */

 unsigned char (*main_data)[MAD_BUFFER_MDLEN];
 /* Layer III main_data() */
 unsigned int md_len; /* bytes in main_data */

 int options; /* decoding options (see below) */
 enum mad_error error; /* error code (see above) */
 };

 enum {
 MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */
 MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */
  #if 0 /* not yet implemented */
 MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */
 MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */
 MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */
  #endif
 };

 void mad_stream_init(struct mad_stream *);
 void mad_stream_finish(struct mad_stream *);

  #define mad_stream_options(stream, opts) \
 ((void) ((stream)->options = (opts)))

 void mad_stream_buffer(struct mad_stream *,
 unsigned char const *, unsigned long);
 void mad_stream_skip(struct mad_stream *, unsigned long);

 int mad_stream_sync(struct mad_stream *);

 char const *mad_stream_errorstr(struct mad_stream const *);

  #endif

 /* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */

  #ifndef LIBMAD_FRAME_H
  #define LIBMAD_FRAME_H


 enum mad_layer {
 MAD_LAYER_I = 1, /* Layer I */
 MAD_LAYER_II = 2, /* Layer II */
 MAD_LAYER_III = 3 /* Layer III */
 };

 enum mad_mode {
 MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */
 MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */
 MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */
 MAD_MODE_STEREO = 3 /* normal LR stereo */
 };

 enum mad_emphasis {
 MAD_EMPHASIS_NONE = 0, /* no emphasis */
 MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */
 MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */
 MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */
 };

 struct mad_header {
 enum mad_layer layer; /* audio layer (1, 2, or 3) */
 enum mad_mode mode; /* channel mode (see above) */
 int mode_extension; /* additional mode info */
 enum mad_emphasis emphasis; /* de-emphasis to use (see above) */

 unsigned long bitrate; /* stream bitrate (bps) */
 unsigned int samplerate; /* sampling frequency (Hz) */

 unsigned short crc_check; /* frame CRC accumulator */
 unsigned short crc_target; /* final target CRC checksum */

 int flags; /* flags (see below) */
 int private_bits; /* private bits (see below) */

 mad_timer_t duration; /* audio playing time of frame */
 };

 struct mad_frame {
 struct mad_header header; /* MPEG audio header */

 int options; /* decoding options (from stream) */

 mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */
 mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */
 };

  #define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1)
  #define MAD_NSBSAMPLES(header) \
 ((header)->layer == MAD_LAYER_I ? 12 : \
 (((header)->layer == MAD_LAYER_III && \
 ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36))

 enum {
 MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */
 MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */

 MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */
 MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */
 MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (#else copy) */
 MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */

 MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */
 MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */
 MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */

 MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */
 MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */
 MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */
 };

 enum {
 MAD_PRIVATE_HEADER = 0x0100, /* header private bit */
 MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */
 };

 void mad_header_init(struct mad_header *);

  #define mad_header_finish(header) /* nothing */

 int mad_header_decode(struct mad_header *, struct mad_stream *);

 void mad_frame_init(struct mad_frame *);
 void mad_frame_finish(struct mad_frame *);

 int mad_frame_decode(struct mad_frame *, struct mad_stream *);

 void mad_frame_mute(struct mad_frame *);

  #endif

 /* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */

  #ifndef LIBMAD_SYNTH_H
  #define LIBMAD_SYNTH_H


 struct mad_pcm {
 unsigned int samplerate; /* sampling frequency (Hz) */
 unsigned short channels; /* number of channels */
 unsigned short length; /* number of samples per channel */
 mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
 };

 struct mad_synth {
 mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
 /* [ch][eo][peo][s][v] */

 unsigned int phase; /* current processing phase */

 struct mad_pcm pcm; /* PCM output */
 };

 /* single channel PCM selector */
 enum {
 MAD_PCM_CHANNEL_SINGLE = 0
 };

 /* dual channel PCM selector */
 enum {
 MAD_PCM_CHANNEL_DUAL_1 = 0,
 MAD_PCM_CHANNEL_DUAL_2 = 1
 };

 /* stereo PCM selector */
 enum {
 MAD_PCM_CHANNEL_STEREO_LEFT = 0,
 MAD_PCM_CHANNEL_STEREO_RIGHT = 1
 };

 void mad_synth_init(struct mad_synth *);

  #define mad_synth_finish(synth) /* nothing */

 void mad_synth_mute(struct mad_synth *);

 void mad_synth_frame(struct mad_synth *, struct mad_frame const *);

  #endif

 /* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */

  #ifndef LIBMAD_DECODER_H
  #define LIBMAD_DECODER_H


 enum mad_decoder_mode {
 MAD_DECODER_MODE_SYNC = 0,
 MAD_DECODER_MODE_ASYNC
 };

 enum mad_flow {
 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
 };

 struct mad_decoder {
 enum mad_decoder_mode mode;

 int options;

 struct {
 long pid;
 int in;
 int out;
 } async;

 struct {
 struct mad_stream stream;
 struct mad_frame frame;
 struct mad_synth synth;
 } *sync;

 void *cb_data;

 enum mad_flow (*input_func)(void *, struct mad_stream *);
 enum mad_flow (*header_func)(void *, struct mad_header const *);
 enum mad_flow (*filter_func)(void *,
 struct mad_stream const *, struct mad_frame *);
 enum mad_flow (*output_func)(void *,
 struct mad_header const *, struct mad_pcm *);
 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
 enum mad_flow (*message_func)(void *, void *, unsigned int *);
 };

 void mad_decoder_init(struct mad_decoder *, void *,
 enum mad_flow (*)(void *, struct mad_stream *),
 enum mad_flow (*)(void *, struct mad_header const *),
 enum mad_flow (*)(void *,
 struct mad_stream const *,
 struct mad_frame *),
 enum mad_flow (*)(void *,
 struct mad_header const *,
 struct mad_pcm *),
 enum mad_flow (*)(void *,
 struct mad_stream *,
 struct mad_frame *),
 enum mad_flow (*)(void *, void *, unsigned int *));
 int mad_decoder_finish(struct mad_decoder *);

  #define mad_decoder_options(decoder, opts) \
 ((void) ((decoder)->options = (opts)))

 int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
 int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);

  #endif

#ifdef __cplusplus
 }
  #endif